Formatted search UDV decimal issue

This fields are height,width and length. I am dividing them with 1000000. But it gives me 0 answer. Now instead of division i use multiplication with value 0.000001 to get the same result it gives me 0.03

Here is an example

(38*18*38)*0.000001 = 0.025992 but I get 0.03 instead of 0.025992 . It is rounding up some how. And not able to figure it out why